Truing apparatus for connecting rods of crank shafts



G. MEYER AND A; HAACKE.

TRUING APPARATl JS FOR CONNECTING RODS 0F CRANK SHAFTS.

APPLICATION FILED MAY 24, I920- Patented Jan. 31, 1922.

2 SHEETS-SHEET I.

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G. MEYER AND A. HAACKE.

TRUING APPARATUS -FOR CONNECTING RODS 0F.CRANK SHAFTSL APPLICATION FILED MAY 24, 1920.

1,404,782, Patented Jan. .31, 1922.

2 SHEETS-SHEET 2.

Z7 W m niirn o .sIrM Es Parana" OFFICE.

GUSTAV MEYER AND ALBERT. HAACKE, OF ST. LOUIS, MI ESSO URI.

TRUING APPARATUS'FOR GONNECTING'RODS OF CRANK SHAFTS.

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Toall whom 2'22 may concern:

' Be it known thatlwe, GUSTAV llIEYEBfiJlCl ALBE T HAAQKE7 citizens of the United States residii gat St. Louis, State 0f Missouri, have invented certainnew and useful Improvements in jTruing Apparatus for Connecting Rods of Crank Shafts, of which the following is a full, clear, and exact description, reference being hadto 'the accompanying drawings forming a parthereof. v p

The present invention is directedto improvements in-truing apparatusfo-rthe connecting rods of crank-shafts, ,the object sought being. to1 provide suitable means for supporting the Crankshaft duringthe tru-v ing of the connectingu'od and the piston coupled thereto. relatively. to the axis of the shaft the apparatus beingprovided with means for supporting a square adaptedto be applied directly to the periphery of the piston and thereby measure the extent to which the .axisofthe piston andconnecting rod departs-from a line which is perpendicular to the axis of the shaft. The advantages of the apparatuswill be apparent from the following detailed description in connection with the accompanying drawings in which Figure 1 represents a sideelevation of the invention showing the manner of applying the same; Fig.2is a vertical cross-section on the line 2+2 of Fig. 1; Fig. 3 is a top plan ofthe device; Fig. 4 is a, diagonal crosssection through the face plate on the line 4 4 of Fig. 2 ;,Fig. 5 is a perspective of the front end; of the gage-bar showing the square resting on the same; and Fig. 6 is a diagrammatic elevation of the face plate shmving: the application thereto of flanges of different diameters.

Referring to the, drawings,

1 represents a "work bench or tablewto which is. bolted the of the groove on the standard being provided with a perforated boss'h for the reception of'theistem 6 of aclamping screw, the stem.terminating. at thetop in an enlarged headGHinderwhich the bar 5 slides, so thatby turning the screw in proper di- Specification of Letters Patent. Patented J an, 31, 1922, Appl icatiomfiled May 24, 1320. Seria1;N0.,383,725. y

rection the head GJnay forcibly. engage the which. the bar I may have been v,rnoved. The bar 5 is providedron onesside atone en d thereof with a guard 7 against whichbears the short leg ofa conventional combination square s when deposited on the bar for gaglng the vangle through which the axis of the. piston, has been deflected .fronnthe. perpendicular to-the .a xis of the crank shaft with any bending, or straini-ng ofthe con necting 1 rod, -as will hereinafter more fully appear. he face plates. is provided. near the; bottom of the front ,face thereon with. two pins or studs 8 8, spaced apart anddis posed normally, in a horizental plane said pins serving as initiahsupports for the flange 9 forming one ofthe terminals of the crank-shaft 10, the outer face of the flange as well understood,infthe art being perpendicular to.the ,aXis of-theshaf t, so that if the face of the flangeis bnought into engagement withthe front face of the plate 4, the 1 axis f the shaft willbe perpendicular to the plane oflsaidlface. In this connection it inayberstated that the bottom. of the groove a. inswhichislides the bar oiis parallel to the axis of the-face plateH r -perpendicular tothe frontface of the face plate, so that when the crank-shaftcis properly mounted the path of movement of the bar 5 will be parallel to-ithe axis of thecrankshaft. Secured to thegface plate between the pins 8,.8, is astud-bolt 11 over whichis passed a bent L-shaped washer or jawl1 2 the larger leg operating 'freely betweenthe pins and the, short leg limiting the inward movementef the jawiby coining-in contact with the-face platel. ,A nut l3 onthezoutside of thelj aw clamps the jaw to orloosens it from the flangefl as presently will more fully appear. The; face plate 4; is; provided with. two (OI'JHOI'B if desired) radial slots s oneon either sideof ;a vertical diameter through-thestud bolt 11, the slots being .formed with v latera] .lolfsets .or recesses 7" 'bar and clamp thesa nein any position-t0 such as s, it is apparent that the jaws 12 may be adjusted radially toaccommodate flanges of difi'erent diameters, no radial adjustment being necessary for the jaw 12. The connecting .rod .16 connecting the crank-shaft to the piston 17 often becomes bent or sprung outof true. perpendicular to the axis of the shaft; and in order to properly square it up to said axis, it is desirable that the shaft be ri idly supported with its axis preferably in a horizontal plane so that the amount of deflection of the axis of the piston and of the connecting rod from a true perpendicular to the shaft axis may be accurately gaged. This deflection being ascertained by the application of the squareS to the piston periphery, the connecting rod may then be readily squared to the crank-shaft aswill be apparent from the following description of the operation of the invention:

Let us assume that the connecting rod 16 has been sprungor bent from a true perpendicular to the axis of the crank-shaft. The machinist thereupon removes the crankshaft from. the crank-case of the engine; as positing the edge or periphery of the flange 9 thereof upon the pins8, 8, bringing the edge of the flange behind the jaw 12 which is loosened sufficiently for the purpose, the bolts 15 and jaws 12' being moved'outward so as to permit the flange 9 to be brought squarely against the face plate a, after which the bolts 15 are moved inward to bring the jaws 12 over the flange, and the nuts 13, 13', screwed down so as to'clamp the flange tightly to the plate and thus'support the crank-shaft, the plate 4 being set in a verti-' cal plane so as to have the axis of the shaft perfectly horizontal. The connecting rod 16 with its piston 17 is swung into a vertical position or across. the path of movement of the gage-bar 5 (where they will remain), af ter which, by loosening the screw-head 6 from the gage bar 5, the latter is pushed forward in its guide or groove (6 until the end carrying the guard 7 is brought close to the piston, after which the square S is deposited. on the bar against the guard as shown in Figs. 1 and 5, thus bringing the outer edge of the Vertical leg of the square in contact with the periphery of the piston. If the Contact is not uniform and shows a deflection of the piston from a true vertical, the machinist takes a wrench or equivalent tool and applies it to the connecting rod, bending the latter in proper direction until an even contact is effected between the leg of thesquare and'piston periphery. This be ing accomplished, the machinist knows that the connecting rod and its piston are squared up to the crank-shaft. The crank-shaft is then removed from'the plate 4 and restored to its engine. It may be stated in passing that the crank-shaft is so'forged that the flange applied to the plate 4.

outer face of the flange 9 is at right angles to the shaft axis, so that when the piston shows an even contact with the outer edge of the square S deposited on the gage bar 5, the machinist knows thatv the deflection in the rod has been corrected. 7 In the present 7 example, only one end of the crank-shaft is shown supported. In case of any danger of. the crank-shaft sagging from a true horizontal (as for example in the case of a very long shaft) the other end may be allowed to rest on a suitable adjustable prop or post (not shown) so as to relieve the plate 4 of a portion of its load. Such a provision would of course fall within the purviewof the skilled mechanic. The construction here shown may obviously be departed from in many particulars without in any wise affeet-ing the nature or spirit of the invention. It is obvious of course that the face plate 4. will accomodate flanges of diflerent diameters, and in Fig. 6 is shown diagrammatically the face plate 4L with a series of dotted circles 9, 9, 9", 9", illustrating different diameters of flanges, the pins 8, 8,'be ing so positioned as to support any flange that may be depositedthereon,'and the slots 3 being suflicient to permit the bolts 15 traversing the same to'be shifted to proper position to cause the jaws '12 thereof to engage any The apparatus need not of course be limited in itsapplication to the truing of crank-shafts:

Having described our invention what we claim is:

l. in an apparatus of the character. described, a fixed support, means'for securing'thereto one end of a crank-shaft, a gagebar mounted slidably on the support and movable parallel to the axis of the shaft thus supported, the bar being adaptedto receive a square applied to the periphery of the piston coupled to the connecting rod leading from the crank-shaft.

2. In an apparatus of the character described, a fixed support, means for securing thereto one end of a crankshaft carrying piston and connecting rod,'a gagebar mountedslidably on the support and movable longitudinally parallel to the axis of the shaft thusv supported, the bar being adapted to receive a square applied to the periphery of the piston swung across the path of movement of the bar, and aguard on the side of the'ba'r for engaging the square deposited thereon.

3. In an apparatus of the character described, a fixed support, a face plate thereon, means on the face plate for Securing thereto the terminal fiangeof a crank-shaft, and maintaining the shaft supported with its axis at right angles to the face plate,.a gage-bar mounted slidably: on the support and capable of. longitudinal movement across the faceplate in apath parallel to the axis of the shaft, the bar being adapted to support at one end thereof a square adapted to be applied to the periphery of a piston coupled to the crank-shaft;

4:. In an apparatus of the character described, a fixed support, a face plate there on, a pair of pins projecting from the lower portion of the plate and spaced apart, a jaw mounted on the face plate between the pins, the plate being provided with elon gated radial slots on either side of a diameter passing between the pins aforesaid, sliding jaws mounted in said slots, the several jaws operating to grip and hold the terminal flange of a crank-shaft deposited with its edge on the pins aforesaid and hearing against the face plate, a top groove or way being formed in the support and face plate and disposed parallel to the axis of the shaft thus supported, and a square-.

supporting gage bar mounted slidably in said groove to present the square deposited thereon against the periphery of a piston coupled to the crank-shaft.

5. In an apparatus of the character described, a face plate, a stud bolt projecting therefrom, a jaw mounted loosely on the bolt, pins projecting from the face plate parallel to and on either side of the bolt,

radial elongated slots being formed in the face plate on either side of a vertical diameter through the stud-bolt, the plate being provided with offsets or recesses on its inner face leading from the slots, machine bolts traversing said slots and projecting through the front of the face-plate, the 1nner ends of the bolts terminating in heads traversing said recesses, jaws on the outer projecting ends of the bolts, the several jaws operating to grip and hold the terminal flange of a crank-shaft deposited with its outer face against the plate and with its edge resting on the pins aforesaid, nuts on the bolts for driving the jaws to the flange, and a gage-bar mounted slidably on the support and movable longitudinally across the face plate in a path parallel to the axis of the crank-shaft thus supported, the bar being adapted to support a square applied to the periphery of a piston leading from the crank-shaft and swung across the path of movement of the gage-bar and square sup ported thereby.

6. In an apparatus of the character described, a suit-able standard, a face plate secured thereto, a groove formed in the top of the standard and face plate and disposed ransverse to the faces of the plate, a gagebarslidably mounted in said groove, and means on the face plate for securing thereto one end of a crank-shaft maintained with its axis parallel to the path of movement of the gage-bar.

7. In an apparatus of the character described, 21 fixed support, means for securing thereto a crankshaft in a position to project outwardlyfrom said support, a gagebar mounted slidably on the support and movable longitudinally parallel to the axis of the shaft thus supported, the bar being adapted to receive a square applied with one leg'thereof to the periphery of the piston coupled to the crank-shaft and swung across the path of movement of the bar and square deposited thereon.

8. In a device of the character described, a portable standard provided with a base and a face plate secured thereto, the latter being provided with means for cooperating with the face plate for securing thereto the terminalflange of a crank-shaft, and the base being provided with means for secur-l ing the standard to a suitable support.

9. In a device of the character described, a portable standardprovided with a base and a face plate secured thereto, the latter being provided with radially adjustable .means for securing thereto the terminal flange of a crank-shaft, and the base being provided with means for securing the standard to a suitable support.

10. In adevice of the character described, a portable standard provided with a base and a face plate secured thereto, clamping means projec-tingfrom the face plate and adjustable for securing to the face plate the terminal flange of a crank-shaft.

In testimony whereof we afliX our signatures atSt. Louis, State of Missouri, this 21st day of May, 1920.

GUSTAV MEYER. ALBERT HAACKE. 

